Question

please solve question no. 13&15...​

Answer 1

Step-by-step explanation:

13.

Amount of work completed by p persons in p days, working p hours a day = (p/p³) = (1/p²)

Amount of work completed by q persons in q days, working q hours a day =

q³ * 1/p²

= q³/p²

Therefore, the answer is Option(A).

15.

3 men's 1-day work = (1/32)

Then, 1 men's 1-day work = 1/96

7 women's 1-day work = (1/32).

Then, 1 women's 1-day work = (1/224).

Now,

7 men + 5 women

= 7(1/96) + 5(1/224)

= (7/96) + (5/224)

= (2/21).

Total time = (21/2).

Now,

Twice as large = (21/2) * 2 = 21 days.

Therefore, the answer is (B).

Hope it helps!